#include <stdio.h>
#include <string.h>
struct Person{
    char names[20];
    int age;
    double height;
};

//int main(){
//    struct Person person;
//    strncpy(person.names,"zhouyu",sizeof(person.names));
//    person.age=12;
//    person.height=165.00;
//    printf("size:%d", sizeof(person));
//}